The 1N4148 is a standard

silicon Silicon is a chemical element with the symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic luster, and is a tetravalent metalloid and semiconductor. It is a member of group 14 in the periodic tab ...

switching signal

diode A diode is a two-terminal electronic component that conducts current primarily in one direction (asymmetric conductance); it has low (ideally zero) resistance in one direction, and high (ideally infinite) resistance in the other. A diode ...

. It is one of the most popular and long-lived switching diodes because of its dependable specifications and low cost. Its name follows the

JEDEC The JEDEC Solid State Technology Association is an independent semiconductor engineering trade organization and standardization body headquartered in Arlington County, Virginia, United States. JEDEC has over 300 members, including some of the w ...

nomenclature. The 1N4148 is useful in switching applications up to about 100 MHz with a reverse-recovery time of no more than 4 ns.

History

Texas Instruments announced the 1N914 diode in 1960. It was registered at

Texas Instruments Texas Instruments Incorporated (TI) is an American technology company headquartered in Dallas, Texas, that designs and manufactures semiconductors and various integrated circuits, which it sells to electronics designers and manufacturers globall ...

no later than 1961, and was second-sourced by 11 manufacturers that same year. The 1N4148 was registered at

in 1968 as a silicon switching signal diode for military and industrial applications. It was second-sourced by many manufacturers;

listed their version of the device in an October 1966 data sheet. These 1N914 and 1N4148 have an enduring popularity in low-current applications.

Overview

As the most common mass-produced switching diode, the 1N4148 replaced the older 1N914, they can be used interchangeably and are cross-reference replacements for each other. They differed mainly in their leakage current specification, however, today most manufacturers list common specifications. For example,

Vishay Vishay Intertechnology, Inc. is an American manufacturer of discrete semiconductors and passive electronic components founded by Poland, Polish-born businessman Felix Zandman. Vishay has manufacturing plants in Israel, Asia, Europe, and the Ameri ...

lists the same leakage current for both parts: * 25 nA at -20 V, 25°C * 5 μA at -75 V, 25°C * 50 μA at -20 V, 150°C

Packages

The JEDEC registered part numbers 1N914 and 1N4148 were originally only available in an axial package, but over time similar parts became available in surface-mount packages too. ;

Through-hole In electronics, through-hole technology (also spelled "thru-hole") is a manufacturing scheme in which leads on the components are inserted through holes drilled in printed circuit boards (PCB) and soldered to pads on the opposite side, either by ...

package: * 1N4148 in DO-35 glass axial package. ; Surface-mount packages: * LL4148 in MiniMELF package. * 1N4148W in

SOD-123 Small Outline Diode (SOD) is a designation for a group of semiconductor packages for surface mounted diodes A diode is a two-terminal electronic component that conducts current primarily in one direction (asymmetric conductance); it has l ...

package. * 1N4148WS in

SOD-323 Small Outline Diode (SOD) is a designation for a group of semiconductor packages for surface mounted diodes A diode is a two-terminal electronic component that conducts current primarily in one direction (asymmetric conductance); it has l ...

package. * 1N4148WT in

SOD-523 Small Outline Diode (SOD) is a designation for a group of semiconductor packages for surface mounted diodes A diode is a two-terminal electronic component that conducts current primarily in one direction (asymmetric conductance); it has l ...

package. Note: Some 1N4148 family surface-mount packages are marked with "T4" text.

Specifications

Absolute maximum ratings (stress ratings, consult datasheet for recommended ratings) * V_RRM = 100 V (maximum repetitive reverse voltage) * I_O = 200 mA (average rectified forward current) * I_F = 300 mA (DC forward current) * I_f = 400 mA (recurring peak forward current) * I_FSM = 1 A at 1 s pulse width; 4 A at 1 μs pulse width (non-repetitive peak forward surge current) Electrical and thermal characteristics * V_F = 1 V at 10 mA (maximum forward voltage) * V_R = 75 V at 5 μA; 100 V at 100 μA (minimum breakdown voltage and reverse leakage current) * t_rr = 4 ns (maximum reverse-recovery time) * P_D = 500 mW (maximum power dissipation)

References

External links

{{Commons category multi, 1N4148, Diodes, Diodes (SMD) Diodes